<!DOCTYPE html>
<html lang="en">

<head>
    <!-- 网站字符集，防止网站出现乱码 -->
    <meta charset="UTF-8">
    <!-- 如果是IE浏览器使用IE最新引擎渲染 -->
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <!-- 视口标签 响应式网站必备 -->
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!-- 网站关键字 -->
    <meta name="keywords" content="博客,web,前端,html,css,javascript,vue,react,nodejs,小程序">
    <!-- 网站描述 -->
    <meta name="description" content="最牛逼前端技术分享,分享web全栈开发等相关的技术文章,热点资源,全栈程序员的成长之路。">
    <!-- 网站作者 -->
    <meta name="author" content="风月笑平生">
    <!-- 网站标题 -->
    <title>HELLO</title>
    <!-- 网站小图标 -->
    <link rel="shortcut icon" href="./images/favicon.ico" />
    <!-- 引入bootstrap.css -->
    <link rel="stylesheet" href="./css/bootstrap.css">
    <!-- 引入bootstrap.js -->
    <script src="./js/bootstrap.js"></script>
</head>

<body>
    <!-- 头部 -->
    <div class="accordion accordion-flush" id="accordionFlushExample">
        <div class="accordion-item">
          <h2 class="accordion-header" id="flush-headingOne">
            <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#flush-collapseOne" aria-expanded="false" aria-controls="flush-collapseOne">
              Accordion Item #1
            </button>
          </h2>
          <div id="flush-collapseOne" class="accordion-collapse collapse" aria-labelledby="flush-headingOne" data-bs-parent="#accordionFlushExample">
            <div class="accordion-body">Placeholder content for this accordion, which is intended to demonstrate the <code>.accordion-flush</code> class. This is the first item's accordion body.</div>
          </div>
        </div>
        <div class="accordion-item">
          <h2 class="accordion-header" id="flush-headingTwo">
            <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#flush-collapseTwo" aria-expanded="false" aria-controls="flush-collapseTwo">
              Accordion Item #2
            </button>
          </h2>
          <div id="flush-collapseTwo" class="accordion-collapse collapse" aria-labelledby="flush-headingTwo" data-bs-parent="#accordionFlushExample">
            <div class="accordion-body">Placeholder content for this accordion, which is intended to demonstrate the <code>.accordion-flush</code> class. This is the second item's accordion body. Let's imagine this being filled with some actual content.</div>
          </div>
        </div>
        <div class="accordion-item">
          <h2 class="accordion-header" id="flush-headingThree">
            <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#flush-collapseThree" aria-expanded="false" aria-controls="flush-collapseThree">
              Accordion Item #3
            </button>
          </h2>
          <div id="flush-collapseThree" class="accordion-collapse collapse" aria-labelledby="flush-headingThree" data-bs-parent="#accordionFlushExample">
            <div class="accordion-body">Placeholder content for this accordion, which is intended to demonstrate the <code>.accordion-flush</code> class. This is the third item's accordion body. Nothing more exciting happening here in terms of content, but just filling up the space to make it look, at least at first glance, a bit more representative of how this would look in a real-world application.</div>
          </div>
        </div>
      </div>
</body>

</html>